I’m not sure how much of that economy would matter in a war time scenario. Most of the industrial factories are outside cities. More sprawling cities like Houst

I’m not sure how much of that economy would matter in a war time scenario. Most of the industrial factories are outside cities. More sprawling cities like Houston would be a lot more independent than an island like Manhattan, which has only a handful of bridges as land entrances and hardly any heavy industry of its own.